| chalk | (noun) a piece of calcite or a similar substance, usually in the shape of a crayon, that is used to write or draw on blackboards or other flat surfaces | - |
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| (noun) an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant | Synonyms: chicken feed, crank, deoxyephedrine, glass, ice, meth, methamphetamine, methamphetamine hydrochloride, Methedrine, shabu, trash |
| (noun) a pure flat white with little reflectance | - |
| (noun) a soft whitish calcite | - |
| (verb) write, draw, or trace with chalk | - |
| chalkboard | (noun) sheet of slate; for writing with chalk | Synonyms: blackboard |
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| chalkpit | (noun) a quarry for chalk | Synonyms: chalk pit |
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| chalkstone | (noun) a deposit of urates around a joint or in the external ear; diagnostic of advanced or chronic gout | Synonyms: tophus |
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| chalky | (adjective) composed of or containing or resembling calcium carbonate or calcite or chalk | Synonyms: calcareous |
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| (adjective) of something having the color of chalk | - |